Arrow keys to move. Space bar to shoot (there is a cool down between your shots). Alien information: Bottom row: Defenders. Worth 10 points. Does nothing. Middle row: Scared Invaders. Worth 20 points. Will disappear after a while, an if it does, it will not give points. Top row: Invaders. Worth 30 points. Shoots lazers randomly. If you get hit, you will lose health. Gold invader. Worth 40 points. Has a chance to appear and fly across the screen. If hit, it will reduce the cooldown of your shots for 10 seconds. Does not need to be defeated to win. Mothership. Worth 50 points. May fly across the top of the screen. Quite hard to hit. Does need to be defeated to win.
